---

yaml
---
r: 360705
b: refs/heads/master
c: 225cf8d
h: refs/heads/master
i:
  360703: d8b3d08
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 832a998190400563a69677b30d5f306e45cc3aff
+refs/heads/master: 225cf8d69c768f4472d2fd9f54bba2b69a588193

trunk/arch/s390/lib/uaccess_pt.c

@@ -202,27 +202,29 @@ static size_t strnlen_user_pt(size_t count, const char __user *src)
 static size_t strncpy_from_user_pt(size_t count, const char __user *src,
 				   char *dst)
 {
-	size_t n = strnlen_user_pt(count, src);
+	size_t done, len, offset, len_str;
 
 	if (unlikely(!count))
 		return 0;
-	if (!n)
-		return -EFAULT;
-	if (n > count)
-		n = count;
 	if (segment_eq(get_fs(), KERNEL_DS)) {
-		memcpy(dst, (const char __kernel __force *) src, n);
-		if (dst[n-1] == '\0')
-			return n-1;
-		else
-			return n;
+		len = strnlen((const char __kernel __force *) src, count) + 1;
+		if (len > count)
+			len = count;
+		memcpy(dst, (const char __kernel __force *) src, len);
+		return (dst[len - 1] == '\0') ? len - 1 : len;
 	}
-	if (__user_copy_pt((unsigned long) src, dst, n, 0))
-		return -EFAULT;
-	if (dst[n-1] == '\0')
-		return n-1;
-	else
-		return n;
+	done = 0;
+	do {
+		offset = (size_t)src & ~PAGE_MASK;
+		len = min(count - done, PAGE_SIZE - offset);
+		if (__user_copy_pt((unsigned long) src, dst, len, 0))
+			return -EFAULT;
+		len_str = strnlen(dst, len);
+		done += len_str;
+		src += len_str;
+		dst += len_str;
+	} while ((len_str == len) && (done < count));
+	return done;
 }
 
 static size_t copy_in_user_pt(size_t n, void __user *to,

trunk/arch/s390/lib/uaccess_std.c

@@ -206,38 +206,24 @@ size_t strnlen_user_std(size_t size, const char __user *src)
 	return size;
 }
 
-size_t strncpy_from_user_std(size_t size, const char __user *src, char *dst)
+size_t strncpy_from_user_std(size_t count, const char __user *src, char *dst)
 {
-	register unsigned long reg0 asm("0") = 0UL;
-	unsigned long tmp1, tmp2;
+	size_t done, len, offset, len_str;
 
-	asm volatile(
-		"   la    %3,0(%1)\n"
-		"   la    %4,0(%0,%1)\n"
-		"   sacf  256\n"
-		"0: srst  %4,%3\n"
-		"   jo    0b\n"
-		"   sacf  0\n"
-		"   la    %0,0(%4)\n"
-		"   jh    1f\n"		/* found \0 in string ? */
-		"  "AHI"  %4,1\n"	/* include \0 in copy */
-		"1:"SLR"  %0,%1\n"	/* %0 = return length (without \0) */
-		"  "SLR"  %4,%1\n"	/* %4 = copy length (including \0) */
-		"2: mvcp  0(%4,%2),0(%1),%5\n"
-		"   jz    9f\n"
-		"3:"AHI"  %4,-256\n"
-		"   la    %1,256(%1)\n"
-		"   la    %2,256(%2)\n"
-		"4: mvcp  0(%4,%2),0(%1),%5\n"
-		"   jnz   3b\n"
-		"   j     9f\n"
-		"7: sacf  0\n"
-		"8:"LHI"  %0,%6\n"
-		"9:\n"
-		EX_TABLE(0b,7b) EX_TABLE(2b,8b) EX_TABLE(4b,8b)
-		: "+a" (size), "+a" (src), "+d" (dst), "=a" (tmp1), "=a" (tmp2)
-		: "d" (reg0), "K" (-EFAULT) : "cc", "memory");
-	return size;
+	if (unlikely(!count))
+		return 0;
+	done = 0;
+	do {
+		offset = (size_t)src & ~PAGE_MASK;
+		len = min(count - done, PAGE_SIZE - offset);
+		if (copy_from_user_std(len, src, dst))
+			return -EFAULT;
+		len_str = strnlen(dst, len);
+		done += len_str;
+		src += len_str;
+		dst += len_str;
+	} while ((len_str == len) && (done < count));
+	return done;
 }
 
 #define __futex_atomic_op(insn, ret, oldval, newval, uaddr, oparg)	\